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SPARQLing Services

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Leigh Dodds
Leigh Dodds

The document discusses SPARQL, a query language for RDF data. It describes the key components of SPARQL, including its specification, query types, results format, and protocol. It also covers implementation issues for SPARQL services and provides examples of using SPARQL to query RSS feeds, geographical data, and more. Extensions discussed include querying by reference, XSLT transformation of results, and a JSON results format.

BusinessTechnology
1 of 47
 
The Three Things ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
API Design Pressures ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
How a Query Language Helps ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SPARQL in a Nutshell ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Example SPARQL Query ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The SPARQL Results Format ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
That Query Again ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The SPARQL Results Format ,[object Object],[object Object]
The SPARQL Results Format ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The SPARQL Results Format ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The SPARQL Results Format ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The SPARQL Protocol ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Example Protocol Request ,[object Object],[object Object],[object Object],[object Object]
Data Set Ambiguities ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Types of SPARQL Service ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
GovTrack
 
 
 
XML Army Knife
 
Protocol Extension: Query by Ref ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Protocol Extension: XSLT ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Querying RSS 1.0 Feeds ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
<rss:item rdf:about=&quot;...&quot;> <rss:link> http://geobloggers.blogspot.com ... </rss:link> <rss:title> geobloggers: &quot;Network Link&quot;... </rss:title> </rss:item>
Querying Geographical Data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
<Placemark> <description> http://london.openguides.org/index.cgi?Natural_History_Museum </description> <name> Natural History Museum </name> <Point> <coordinates>-0.175292,51.496052 </coordinates> </Point> </Placemark>
 
 
Querying Geographical Data #2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
 
Protocol Extension: JSON ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
{ &quot;head&quot;: { &quot;vars&quot;: [ &quot;img&quot; , &quot;title&quot; , &quot;description&quot; ] } , &quot;results&quot;: { &quot;distinct&quot;: false , &quot;ordered&quot;: false , &quot;bindings&quot;: [ { &quot;img&quot;: { &quot;type&quot;: &quot;uri&quot; , &quot;value&quot;: &quot;http://www.ldodds.com/ldodds.jpg&quot; } , &quot;title&quot;: { &quot;type&quot;: &quot;literal&quot; , &quot;value&quot;: &quot;Leigh Dodds&quot; } , &quot;description&quot;: { &quot;type&quot;: &quot;literal&quot; , &quot;value&quot;: &quot;British; biology graduate...&quot; } } ] } }
 
 
 
 
Implementation Issues ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Implementation Issues ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Three Things (again) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
Attributions ,[object Object],[object Object]

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